... centre zero scale 双边刻度(中心为零) centreboard n. (帆船的)活动船板,中插板 centrecut 中心[锥形]掏槽 ...
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centreboard halyard 中插板吊索
centreboard pennant 中插板索
centreboard case 中央板套筒
同义词： centerboard drop keel sliding keel
以上来源于: WordNet
N a supplementary keel for a sailing vessel, which may be adjusted by raising and lowering (船)中插板 → compare daggerboard
The centreboard problem is largely under control and temporarily repaired, and the crew made a temporary repair to limit the water ingress but they still have been taking water since, and need to maintain a regular routine pumping out.
UNESCO: EDUCATION
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